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基于连续束缚态的高品质因子双波长Fano共振

王琳 董繁龙

王琳, 董繁龙. 基于连续束缚态的高品质因子双波长Fano共振[J]. 中国光学(中英文), 2023, 16(4): 824-832. doi: 10.37188/CO.2022-0166
引用本文: 王琳, 董繁龙. 基于连续束缚态的高品质因子双波长Fano共振[J]. 中国光学(中英文), 2023, 16(4): 824-832. doi: 10.37188/CO.2022-0166
WANG Lin, DONG Fan-long. High quality factor dual wavelength Fano resonance based on continuous bound states[J]. Chinese Optics, 2023, 16(4): 824-832. doi: 10.37188/CO.2022-0166
Citation: WANG Lin, DONG Fan-long. High quality factor dual wavelength Fano resonance based on continuous bound states[J]. Chinese Optics, 2023, 16(4): 824-832. doi: 10.37188/CO.2022-0166

基于连续束缚态的高品质因子双波长Fano共振

基金项目: 国家自然科学基金(No. 61575008);深圳市博士后科研资助项目(No. 202028555301027);衢州市指导性科技攻关项目(No. 2021076)
详细信息
    作者简介:

    王 琳(1984—),女,江苏徐州人,硕士,讲师,2009年于南京邮电大学获得硕士学位,主要从事高性能传感器研发及在工业领域的应用。E-mail:cindw@126.com

    董繁龙(1987—),男,江苏徐州人,博士,副教授,2016年于北京工业大学获得博士学位,主要从事高功率半导体激光器及超材料的研究。E-mail:dongfanlong@sztu.edu.cn

  • 中图分类号: S220.4

High quality factor dual wavelength Fano resonance based on continuous bound states

Funds: Supported by National Natural Science Foundation of China (No. 61575008); Shenzhen Postdoctoral Scientific Research Funding Project (No. 202028555301027); Quzhou Guiding Science and Technology Research Project (No. 2021076)
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  • 摘要:

    为了提高品质因子(Quality value,Q)以增强光与物质的耦合作用,本文提出一种结构简单、工艺制备要求低的介质超材料,它可激发对称保护的连续介质束缚态(bound states in the continuum , BICs)。该介质超材料具有四聚孔组成的平面纳米孔板,通过改变纳米孔的位置,可使对称保护BIC转变为对称保护的QBIC,进而诱导出两个高品质因子Q值Fano共振。经计算Fano共振在非对称参数Δ=3 nm时,Q值可达到1×e6。随后将QBIC和Fano共振的远场辐射分解为不同多极子分量的贡献,基于散射功率和电场矢量分布可以发现,介质超材料在λ1出现高Q值Fano共振主要是因为磁四极子和环偶极子的存在,而在λ2出现高Q值Fano共振主要是因为环偶极子的存在。最后分析计算了纳米孔边长和纳米孔填充材料对两个Fano共振的影响。本文的研究可以为研究制备高Q值光学响应器件提供理论指导。

     

  • 图 1  介质超材料结构示意图

    Figure 1.  Schematic diagram of medium metamaterial structure

    图 2  介质超材料制备工艺流程

    Figure 2.  Preparation process of dielectric metamaterials

    图 3  (a)非对称参数对介质超材料透射光谱的影响;(b) 不同偏振对透射光谱的影响

    Figure 3.  (a)Influence of asymmetric parameters on transmission spectrum of dielectric metamaterials; (b) influence of different polarization on transmission spectrum

    图 4  介质超材料分别在两个波长λ1λ2处的电场分布。(a)λ1x-y面电场;(b)λ1z-y面电场;(c)λ2x-y面电场;(d)λ2z-y面电场

    Figure 4.  Electric field distributions of dielectric metamaterials at two wavelengths λ1 and λ2, respectively. (a)x-y electric field (λ1); (b) z-y electric field (λ1); (c) x-y electric field (λ2); (d) z-y electric field (λ2)

    图 5  Fano共振曲线拟合

    Figure 5.  Fano resonance curve fitting

    图 6  非对称参数对Q值的影响

    Figure 6.  Influence of asymmetric parameters on Q value

    图 7  (a)和(b)分别是超材料在两个Fano共振波长附近的多极子散射功率;(c)和(d)分别是超材料在两个Fano共振波长处的电场矢量分布

    Figure 7.  (a) and (b) are the multipole scattering powers of metamaterials near the two Fano resonance wavelengths, respectively; (c) and (d) are the electric field vector distributions of metamaterials at two Fano resonance wavelengths, respectively

    图 8  结构参数对超材料共振波长的影响。(a)纳米孔边长r;(b)纳米孔填充材料折射率n1

    Figure 8.  The influence of structural parameters on the resonant wavelength of metamaterials. (a) Nano pore side length r; (b) refractive index n1 of nano pore filling material

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出版历程
  • 收稿日期:  2022-07-18
  • 修回日期:  2022-08-15
  • 录用日期:  2022-11-11
  • 网络出版日期:  2023-02-09

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